package shiroHelloWord;

import org.apache.shiro.SecurityUtils;
import org.apache.shiro.authc.*;
import org.apache.shiro.config.IniSecurityManagerFactory;
import org.apache.shiro.mgt.SecurityManager;
import org.apache.shiro.session.Session;
import org.apache.shiro.subject.Subject;
import org.apache.shiro.util.Factory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;


/**
 * Simple Quickstart application showing how to use Shiro's API.
 *
 * @since 0.9 RC2
 */

import org.apache.shiro.SecurityUtils;
import org.apache.shiro.authc.IncorrectCredentialsException;
import org.apache.shiro.authc.LockedAccountException;
import org.apache.shiro.authc.UnknownAccountException;
import org.apache.shiro.authc.UsernamePasswordToken;
import org.apache.shiro.config.IniSecurityManagerFactory;
import org.apache.shiro.session.Session;
import org.apache.shiro.subject.Subject;
import org.apache.shiro.util.Factory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class Quickstart{

    private static final transient Logger log = LoggerFactory.getLogger(Quickstart.class);


    public static void main(String[] args) {

        // The easiest way to create a Shiro SecurityManager with configured
        // realms, users, roles and permissions is to use the simple INI config.
        // We'll do that by using a factory that can ingest a .ini file and
        // return a SecurityManager instance:

        // Use the shiro.ini file at the root of the classpath
        // (file: and url: prefixes load from files and urls respectively):
        Factory<SecurityManager> factory = new IniSecurityManagerFactory("classpath:shiro.ini");
        SecurityManager securityManager = factory.getInstance();

        // for this simple example quickstart, make the SecurityManager
        // accessible as a JVM singleton.  Most applications wouldn't do this
        // and instead rely on their container configuration or web.xml for
        // webapps.  That is outside the scope of this simple quickstart, so
        // we'll just do the bare minimum so you can continue to get a feel
        // for things.
        SecurityUtils.setSecurityManager(securityManager);

        // Now that a simple Shiro environment is set up, let's see what you can do:

        // get the currently executing user:

        //获取当前的subject，调用SecurityUtils.getSubject()
        Subject currentUser = SecurityUtils.getSubject();

        // Do some stuff with a Session (no need for a web or EJB container!!!)
        //测试使用session
        //获取session currentUser.getSession();
        Session session = currentUser.getSession();
        session.setAttribute("someKey", "aValue");
        String value = (String) session.getAttribute("someKey");
        if (value.equals("aValue")) {
            log.info("-----》Retrieved the correct value! [" + value + "]");
        }

        // let's login the current user so we can check against roles and permissions:
        //测试当前用户是否已经被认证，即是否已经登陆
        //调用subject的isAuthenticated()
        log.info("登录:"+currentUser.isAuthenticated());
        if (!currentUser.isAuthenticated()) { //如果没有登录
        // 把用户名和密码封装为UsernamePasswordToken对象
            UsernamePasswordToken token = new UsernamePasswordToken("lonestarr", "vespa");
            //记住我
            token.setRememberMe(true);
            try {
                //执行登录
                currentUser.login(token);
                log.info("登录:"+currentUser.isAuthenticated());
            } catch (UnknownAccountException uae) {//未知的账户
                //若没有指定的账户，则shiro将会抛出UnknownAccountException异常
                log.info("没有账户信息 " + token.getPrincipal());
                return;
            } catch (IncorrectCredentialsException ice) {//账户存在，密码不对
                log.info( token.getPrincipal() + " 密码不对!");
                return;
            } catch (LockedAccountException lae) {//用户被锁定的异常
                log.info("The account for username " + token.getPrincipal() + " is locked.  " +
                        "Please contact your administrator to unlock it.");
            }
            // ... catch more exceptions here (maybe custom ones specific to your application?
            catch (AuthenticationException ae) {//所有认证时异常的父类
                //unexpected condition?  error?
            }
        }

        //say who they are:
        //print their identifying principal (in this case, a username):
        log.info("---》User [" + currentUser.getPrincipal() + "] logged in successfully.");

        //test a role:
        //是否有某个角色 调用subject hasRole()方法 判断角色
        if (currentUser.hasRole("schwartz")) {
            log.info("拥有schwartz角色");
        } else {
            log.info("没有角色");
            return;
        }

        //test a typed permission (not instance-level)
        //测试用户是否具备某一个行为 调用subject 的isPermitted
        if (currentUser.isPermitted("lightsaber:weild")) {
            log.info("You may use a lightsaber ring.  Use it wisely.");
        } else {
            log.info("Sorry, lightsaber rings are for schwartz masters only.");
        }

        //a (very powerful) Instance Level permission:
        //测试用户是否具备某一个行为
        if (currentUser.isPermitted("user:delete:zhangsan")) {
            log.info("你可以对用户-zhangsan执行删除操作");
        } else {
            log.info("你不能删除zhangsan");
        }

        //all done - log out!
        //执行登出 subject.logout()
        currentUser.logout();
        //检测是否被认证
        log.info("登出:"+currentUser.isAuthenticated());

        System.exit(0);
    }
}
